<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title></title>
    <style>
        h1:hover{
            color: red;
        }
        a:visited{
            color: blue;
        }
       
    </style>
</head>
<body>
    <h1>标题</h1>
    <a href="http://www.qq.com">qq</a>
    <a href="http://www.baidu.com">baidu</a>
</body>
</html>